Bridal Party Flower colors

My bridesmaids are all wearing different shades of red, orange and yellow dresses. Here are pics of the colors from the website, but the colors look different in person and these aren't the dresses they will be wearing.

I know I want a colorful bouquet but I don't know if I should have their bouquets be colorful with all the colors, one solid color like red (which is my main color) or mainly white with greenery.

Also for those of you who did real touch bouquets from an online vendor when did you order yours. I thought I could wait a few months but I was thinking of getting them through Shavon's and it says she already has dates through 2012. I just didn't want to do it too early.